webserver build process improvements

[sanderegg]

Some proposals for next iterations on the static-webserver:

• moving client compile as a stage of static-webserve/Dockerfile will accelerate image build (notice that make build-x always start compiling the front-end and cannot parallelize)
• rename web/sever -> webserver so it follows the same pattern as the rest
• move web/client outside of web. I suggest even outside services and have a clients folder so in the future we could even have multiple frontends? just a suggestion ...

Originally posted by @pcrespov in #2353 (comment)

[pcrespov]

@odeimaiz how do you feel about these changes (read last point above). This shall give the front-end even more independence . It is a first step to even connect to any backend while developing.

[odeimaiz]

I don't see any benefits, but if you want to move all the files from /services/web/client/ to /clients/qx/, go for it.

[sanderegg]

#3367 fulfilled first point. build time is reduced by a substantial amount as the client is now built in parallel with the other services instead of sequentially. CI is faster, as are local builds (30% improvement on a local dev machine for production builds)